Multiple sheave-block.



LUG. RUGGLES.

MULTIPLE SHEAVE BLOCK.

APPLICATION min umso. 1910.

Patented Dec. 21, 1915.

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wilma/Jeb COLUMBIA PLANOGRAPH CO..WASHINGTON. D. c.

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ATENE EFFIQ.

LOUIS G. RUGGLES, F` NEW YORK, N.`Y., ASSIGNOB TO LI'DGERl/VOOD MANUFACTURING COMPANY, OF NEWY'ORK, N. Y., A CGRYORATION 0I? NEW YORK.

To all 'whom t may concern Be it known that I, LOUIS Gr.-RUGGLES, a citizen of the United States, and a resident of New York city, borough of Manhattan,in

the countyof New York and State of New York, have invented certain new and useful A i Improvements in Multiple sheave-Blocks,

of which the following is a specification.

"My invention relates to new and useful improvements in multiple Ysheave blocks, and has for its purpose tolprovide means l 'whereby the resultant oftheforces of the f beingto prevent'lateral strains on the bolt.

loads'on 'the different blocks and the point" tending to crystallize the same, by causing the resultant ofthe load forces to be in line with the "longitudinal axis `of the -bolt wherebythe combined pull on the blocks is always lengthwise of the bolt.

'The invention consists in the improvements to be fully described hereinafter and,

the novelty of which willbeparticularly pointed out and distinctly claimed.

AI have fully and clearly illustrated my in "vention in the accompanying drawings to be taken asa part of this specification, andv 'wherein- Figure l is a view in side elevation of a l construction embodyingmmy'invention; Fig.

2 is a view in-end elevation partly insee-- tion of the same structure 'shown in Fig. 1; Fig. 3 1s a view 'in end elevation showing a I .position taken by the parts when the pulleys l lare subjected to different loads.

eReferring to the drawings by characters of reference, ldesignates aA suspension dey, vice or connection by meansof which the y' blockis suspended from asupport.

` specific construction ofthis suspension defuppere'nd an eye 3j by means of which the pulley 1s connected to. its support by any suitable means, not shown. "At its lower yLend the bolt is provided with ahead f1 which n Vviceis immaterial but I preferably make the samein the formbfa bolt12 lia-ying atY its consists of au'fannulus `slipped over the The i MULTIPLE snEsvE-BLOCK.

Patented Dee. 21, 1915.

Application filedDecember 30, 1910. v Serial No. 600,032.

lower end of thepbolt and held in place by upsetting the end of said bolt, as shown at 5. Surrounding the bolt between the eye `and the head t is a sleeve or collar 6, which is adapted to rotate freely about the bolt and iS vprevented from being pulled from the same by means of the head l above described. r l

Connected tothe collar 6 is a compensating or equalizing means from which the blocks hereinafter to be described are suspended, said compensating means being constructed and arrangedso as to equalize the lead on the several pulleys or sheaves wherebvvthe resultant'of the forces represented by the products of the leverage'by the load on each pulley will be on a line extending longitudinally of the suspension bolt. This compensating device may take a number of forms, but I prefer 'to construct the same as follows: At diametrically opposite points pcsition by cross pins 10, 10. ,It will be noted that inthe arrangement shown these plates 8, 8 are spaced apart from each other,

Vand I connect the same at points below the suspension bolt with connecting bolts 11,

1.2 which bridge the space between said plates, as shown clearly in Fig. 1, said bolts being held in place by nuts 13 on the opag'ainst displacementlby transverse Cotter pins 14. The arrangement of the trunnions 7 and bolts 1l and 12 is such that each is `4located at substantially one of the apeXes ofan equilateral triangle,the trunnion connection being at the upper apex and the bolts 11, 12 at the lower lateral apeXes.

4Suspended on each of the bolts 11 and 12 pulley is arrangedthe sheave 19 over which the load ropes pass, 'said pulleys being mounted on transverse aXle bolts 20. YAt

`their lower ends cacho-fthe pulley blocks is rovided with a downwardly extendingf posite vends thereof, said nuts being held projection 21 which projections are connected by a link 22, which arrangement Y serves when there are rop-es running over Vrun over but one of the sheaves.

both of the sheaves to preserve a proper rope lead by making both sheaves lie substantially parallel to each other. Thisresult is especially advantageous when the Vblock is used in connection with hoisting buckets or other means -employing twoKV pension device. This is due to the fact that, as the two blocks swing about the, point of suspension of the said di'erential compensating device, their respective leverages change, one increasing and the other decreasing automatically with the increase and decrease ofthe load on the two blocks |Ihe specific construction of the'blocks is vimmaterial and I do not desire to be limited to the detailed construction thereof whichv I have shown and described. v

In operation, the improved block embody- .ing my invention may be used with a rope running over each of the sheaves of the.

pulleys, as shown in Fig. 3, or a rope may It is obvious that if a rope run over but one of the sheaves the load exerted on the sheave will pull down on the plates 8, so that the supporting bolt 11 or 12, as the case may be, for that particular pulley over' which the ropepasses, will be 'below the pivotal con- A nection `7, so `that the load on the pulley will be on a line extending longitudinally through said bolt, whereby the pull on the Vbolt will be in the direction of said line and all lateral strains on the bolt be obviated, with the result -that the crystallization of the bolt or bending of the same is pre- I vented. In the case where ropes are run-V ning over both of the sheaves, if the load on both ropesis equal, the plate will swing to take the position shown in Fig; 2, so

. that the bolts 11 and 12 are equidistant on opposite sides of the bolt 7, the resultant of the :loads will be on a line extending through the longitudinal axis Vof the bolt 2. Should the load on the sheaves. be different, then the pulley subjected to' the greater load will be pulled down, so that the pulleys may take a position substantially as shown in Fig. 3 with the pulley of the greater load lower than the one with v the lighter load, in which case the diilerential compensating plates are .shifted to' one side as shown in Fig. 3,' but as Vin the., pensionfdevice, blocks pivotally suspended `1 vsaid device, a

.pension device.

' ber and blocks.

cases above described, the resultant of the two loads is still exertedin the direction of a line extending 'Y through the longitudinal axis of the bolt.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is z- Y p 1. In a multiple sheave block, the combination of asuspension device, a swivel on substantially equilateral triangular member pivoted at Voneof its angles on said swivel, and blocks jeach suspended from said member at one of the other angles of said member and on opposite sides of said pivot, whereby the `resultantY of the loads on the bloclrsis at all times in a line extending vice; .Y f Y. 2. In amultiplesheave block, the 'combination of a suspension device, Vaf.-pair` of blocks, a differential load compensating delongitudinally through said de-A vice, means for p ivotally connectingsaid Y compensatingdeviceto said suspensiondevice, and individual meansgforV suspending each of said blocks from said compensating device, said pivotalconnection andthe said po-ints of suspension beingV locatedY relative to each other whereby the vresultant fof the extending longitudinally through said'sus-l ,loads on the blocks is at all times ina line 3. In a multiple sheaveblock, the combi- Y nation v of a suspension bolt, a swivel Yon the bolt, a substantially equilateraltriangular member pivoted at one of its angles on the,swivel, and blocks, each suspendedffrom said member at one ofthe` other angles of said member'and 'on opposite sides of said pivot, whereby the resultant of loadsjon the Y' blocks Ais at all-times ina lineV extending. longitudinally through said bolt, and meansV for maintaining parallelism ofthe blocks.

4. In a multipleV sheaveV block, in'combination, a suspension device, fa member ful crumed intermediate its: ends onl said sus-L pension device, blocks each pivotally sus Vpended from said member on opposite sides Voii its fulcrum to swing laterally on said Y member, g and means independent of their support for maintaining parallelism of said blocks throughout movement of said-mem- 5. In aA multiple sheave block, in combination, a suspension device, Y a memberV fulcrumed intermediate its endsvon said sus; pension device, blocks Vpivotally suspended respectively from saidmeinber on opposite v sides of its ulcrum, and free to swingV laterally onj their pivots, and means separate from the suspension member forfpivotally..

connecting the blocks. Y Y 6. In a multiple'sheave block, in comblv nation, asuspensiondevice, a member ful- Y crumed intermediate its ends on said susrespectively from said member on opposite sides of its fulcrum, projections on the lowerV ends of the blocks, and a link member pivotally connecting said projections.

7. In a multiple sheave block, a suspension bolt having a shoulder, a collar rotatably mounted on the bolt and supported by said shoulder, a differential compensating device `pivoted to the said collar, and blocks pivoted to said compensating device,

the pivot between said device and said co1- larand the pivots for connecting the blocks to said device being disposed substantially at the angles of an equilateral triangle.

8. In a multiple sheave block, a, suspension device, a differential compensating de- LOUIS G. RUGGLES.

Witnesses:

OT'ro J. CHRIST, C. G. HEYLMUN.

Gopies f this patent may be obtained for ve cents each, by addressing the "Commissioner of Patents,

Washington, D. C. 

